[PATCH] [llgo] Elide alloca for unused received values in select

[Andrew Wilkins]

================
Comment at: irgen/channels.go:136
@@ +135,3 @@
+		}
+		return len(*extract.Referrers()) > 0
+	}
----------------
pcc wrote:
> axw wrote:
> > pcc wrote:
> > > There could in principle be multiple `extract` referrers. With this code you end up checking only the first one.
> > The loop and index check should take care of multiple extract instructions. I don't think there would ever be multiple extract referrers with the same index, would there?
> Yes, I meant multiple `extract` referrers with the same index. I agree that we probably won't ever see this, but it wouldn't hurt to check for them.
Okay, done.

http://reviews.llvm.org/D6785

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